EN ISO 9614-3-2009 en Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 3 Precision method for measurement by scanning《声学 声强法测定噪声源的声功率级 .pdf

1、BS EN ISO9614-3:2009ICS 17.140.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAcoustics Determination ofsound power levels ofnoise sources usingsound intensityPart 3: Precision method formeasurement by scanning (ISO9614-3:2002)This British Standardwas publish

2、ed under theauthority of the StandardsPolicy and StrategyCommittee on 30 April2010 BSI 2010ISBN 978 0 580 67419 8Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 9614-3:2009National forewordThis British Standard is the UK implementation of EN ISO 9614-3:2009.It is identical to IS

3、O 9614-3:2002. It supersedes BS EN ISO 9614-3:2002which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EH/1/4, Machinery noise.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport

4、to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 9614-3August 2009ICS 17.140.01 Supersedes EN ISO 9614-3:2002 E

5、nglish VersionAcoustics - Determination of sound power levels of noisesources using sound intensity - Part 3: Precision method formeasurement by scanning (ISO 9614-3:2002)Acoustique - Dtermination par intensimtrie des niveauxde puissance acoustique mis par les sources de bruit -Partie 3: Mthode de p

6、rcision pour mesurage parbalayage (ISO 9614-3:2002)Akustik - Bestimmung der Schallleistungspegel vonGeruschquellen aus Schallintensittsmessungen - Teil 3:Scanning-Verfahren der Genauigkeitsklasse 1 (ISO 9614-3:2002)This European Standard was approved by CEN on 20 July 2009.CEN members are bound to c

7、omply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Manage

8、ment Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theo

9、fficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Sl

10、ovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN nati

11、onal Members.Ref. No. EN ISO 9614-3:2009: EBS EN ISO 9614-3:2009EN ISO 9614-3:2009 (E) 3 Foreword The text of ISO 9614-3:2002 has been prepared by Technical Committee ISO/TC 43 “Acoustics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 9614-3:2009 by Te

12、chnical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2010, and conflicting national standards shall be withdraw

13、n at the latest by February 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 9614-3:2002. This do

14、cument has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directives. For relationship with EC Directives, see informative Annexes ZA and ZB, which are integral parts of this document. According

15、 to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, L

16、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 9614-3:2002 has been approved by CEN as a EN ISO 9614-3:2009 without any modification. BS EN ISO 9614-3:2009EN ISO 96

17、14-3:2009 (E) 4 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of co

18、nforming to Essential Requirements of the New Approach Directive 98/37/EC, amended by 98/79/EC on machinery. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance w

19、ith the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations. WARNING - Other requirements and other EU Directives may be applicable to the p

20、roduct(s) falling within the scope of this standard. BS EN ISO 9614-3:2009EN ISO 9614-3:2009 (E) 5 Annex ZB (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC This European Standard has been prepared under a mandate given to CEN by the

21、 European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 2006/42/EC on machinery. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented

22、 as a national standard in at least one Member State, compliance with the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations. WARNING Other

23、 requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard. BS EN ISO 9614-3:2009ISO 9614-3:2002(E) ISO 2002 All rights reserved iiiContents Page Foreword . v Introduction vi 1 Scope 1 2 Normative references 1 3 Terms and definitions. 2 4 Gene

24、ral requirements . 7 4.1 Size of sound source under test 7 4.2 Character of sound radiated by the source 7 4.3 Measurement uncertainty. 7 5 Acoustic environment. 9 5.1 Criteria for adequacy of the test environment . 9 5.2 Extraneous intensity. 9 5.3 Wind and gas flows. 9 5.4 Temperature. 9 5.5 Confi

25、guration of the surroundings 9 5.6 Atmospheric conditions . 9 6 Instrumentation . 10 6.1 General . 10 6.2 Calibration and field check. 10 6.3 Time-series of sound intensity and sound pressure. 10 7 Installation and operation of the source. 10 7.1 General . 10 7.2 Operating conditions of the source u

26、nder test 11 8 Measurement of normal sound intensity component levels 11 8.1 Determination of measurement surface . 11 8.2 Determination of scanning paths and segments. 11 8.3 Measurements . 12 8.4 Further actions 14 9 Determination of sound power level . 15 9.1 Calculation of partial sound powers f

27、or each partial surface of the measurement surface. 15 9.2 Calculation of normalized sound power level 15 10 Information to be recorded. 15 Annex A (informative) List of symbols used in this part of ISO 9614 . 17 Annex B (normative) Calculation of field indicators. 19 B.1 General . 19 B.2 Definition

28、 of field indicators. 19 B.2.1 Temporal variability indicator, FT19 B.2.2 Unsigned pressure-intensity indicator, np IF . 19 B.2.3 Signed pressure-intensity indicator, npIF 20 B.2.4 Field non-uniformity indicator, FS. 21 Annex C (normative) Procedure for achieving the desired accuracy . 22 C.1 Qualif

29、ication requirements. 22 C.1.1 General . 22 BS EN ISO 9614-3:2009ISO 9614-3:2002(E) iv ISO 2002 All rights reservedC.1.2 Check for the adequacy of the averaging time 22 C.1.3 Check for the repeatability of the scan on a partial surface. 22 C.1.4 Check for the adequacy of the measurement equipment .2

30、2 C.1.5 Check for the presence of strong extraneous noise . 23 C.1.6 Check for the field non-uniformity. 23 C.2 Action to be taken to increase the grade of accuracy of determination . 23 Annex D (informative) Effects of airflow on measurement of sound intensity. 26 Annex E (informative) Effect of so

31、und absorption within the measurement surface 27 Annex F (informative) Measurement surface and scanning procedure 28 Annex G (informative) Procedure for obtaining time-averaged intensities and squared pressures from a sequence of short-time averaged intensities and squared pressures . 29 Annex H (in

32、formative) Normalization of sound power level. 30 H.1 General . 30 H.2 Calculation of normalized sound power level 30 Annex I (informative) Field indicators used in ISO 9614-1, -2 and -3. 32 Bibliography 33 BS EN ISO 9614-3:2009ISO 9614-3:2002(E) ISO 2002 All rights reserved vForeword ISO (the Inter

33、national Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has

34、been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical st

35、andardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies

36、for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISO 9614 may be the subject of patent rights other than those identified above. ISO shall not b

37、e held responsible for identifying any or all such patent rights. ISO 9614-3 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. ISO 9614 consists of the following parts, under the general title Acoustics Determination of sound power levels of noise sources using soun

38、d intensity: Part 1: Measurement at discrete points Part 2: Measurement by scanning Part 3: Precision method for measurement by scanning Annexes B and C form a normative part of this part of ISO 9614. Annexes A, D, E, F, G, H and I are for information only. BS EN ISO 9614-3:2009ISO 9614-3:2002(E) vi

39、 ISO 2002 All rights reservedIntroduction 0.1 The sound power radiated by a source is equal in value to the integral of the scalar product of the sound intensity vector and the associated elemental area vector over any surface totally enclosing the source. Other International Standards which describ

40、e methods of determination of the sound power levels of noise sources, principally ISO 3740 to ISO 3747, without exception specify sound pressure level as the primary acoustic quantity to be measured. The relationship between sound intensity level and sound pressure level at any point depends on the

41、 characteristics of the source, the characteristics of the measurement environment, and the disposition of the measurement positions with respect to the source. The procedures specified in ISO 3740 to ISO 3747 are not always applicable, for the following reasons. a) Specific facilities are necessary

42、 if high precision is required. It is frequently not possible to install, and operate, large pieces of equipment in such facilities. b) They cannot be used in the presence of high levels of extraneous noise generated by sources other than that under investigation. 0.2 This part of ISO 9614 specifies

43、 methods of determining the sound power levels of sources, within specific ranges of uncertainty, under test conditions which are less restricted than those required by ISO 3740 to ISO 3747. It is recommended that personnel performing sound intensity measurements according to this part of ISO 9614 a

44、re appropriately trained and experienced. 0.3 This part of ISO 9614 complements ISO 9614-1, ISO 9614-2 and the ISO 3740 to ISO 3747 series, which specify various methods for the determination of sound power levels of machines and equipment. It differs from the ISO 3740 to ISO 3747 series principally

45、 in three aspects. a) Measurements are made of sound intensity as well as of sound pressure. b) The uncertainty of the sound power level determined by the method specified in this part of ISO 9614 is classified according to the results of specified ancillary tests and calculations performed in assoc

46、iation with the test measurements. c) Current limitations of intensity measurement equipment which conforms to IEC 61043 restrict measurements to the one-third octave range 50 Hz to 6,3 kHz. Octave band and band-limited A-weighted values are determined from the constituent one-third-octave band valu

47、es. 0.4 The integral over any surface totally enclosing the source of the scalar product of the sound intensity vector and the associated elemental area vector provides a measure of the sound power radiated directly into the air by all sources located within the enclosing surface and excludes sound

48、radiated by sources located outside this surface. In practice, this exclusion is effective only if the source under test and other sources of extraneous intensity on the measurement surface are stationary over time. In the presence of sound sources operating outside the measurement surface, any syst

49、em lying within the surface can absorb a proportion of energy incident upon it. The total sound power absorbed within the measurement surface will appear as a negative contribution to source power, and can produce an error in the sound power determination. In order to minimize the associated error, it is therefore necessary to remove any sound-absorbing material lying within the measurement surface which is not normally present during the operation of the source under test. This method is based on sampling of the intensity normal to the measuremen